Fichier de données chunnelfr.dat utilisé pour générer ce graphe :

# Chiffres du trafic d’Eurotunnel.
# Chiffres originaux :
# http://en.wikipedia.org/wiki/File:Chunnel_traffic.svg
# en millions de passagers / tonnes
#
Année 	Eurostar (passagers)	Navettes Passagers d’Eurotunnel	Trains de marchandises	Navettes Camions d’Eurotunnel (fret)
1994	0.100000	0.2	0.000000	0.8
1995	2.920309	4.4	1.349802	5.1
1996	4.995010	7.9	2.783774	6.7
1997	6.004268	8.6	2.925171	3.3
1998	6.307849	12.1	3.141438	9.2
1999	6.593247	11	2.865251	10.9
2000	7.130417	9.9	2.947385	14.7
2001	6.947135	9.4	2.447432	15.6
2002	6.602817	8.6	1.463580	15.6
2003	6.314795	8.6	1.743686	16.7
2004	7.276675	7.8	1.889175	16.6
2005	7.454497	8.2	1.587790	17
2006	7.858337	7.8	1.569429	16.9
2007	8.260980	7.9	1.213647	18.4
2008	9.113371	7	1.239445	14.2
2009 	9.220233 	6.9 	1.181089	10.0
2010	9.528558	7.5	1.128079	14.2

Fichier script gnuplot exécuté pour générer ce graphe :

set terminal svg enhanced fsize 12 size 750,500
set output 'chunnel traffic-fr.svg'
set datafile missing '-'
set datafile separator "\t"
set style data linespoints

set title "Trafic du tunnel sous la Manche" 

set xtics nomirror
set ytics 2
set y2tics 2
set xlabel "Ann\ée"
set ylabel "Millions de passagers"
set y2label "Millions de tonnes de marchandises"
set grid noxtics
set grid ytics
set key on inside left top box
set yrange [0:22]
set y2range [0:22]

set style line 1 lw 3 pt 4 # Eurostar passagers
set style line 2 lw 3 pt 4 # Navettes Passagers
set style line 3 pt 3 # Navettes Camions
set style line 4 pt 3 lc rgb "#660066" # Trains de fret

plot 'chunnelfr.dat' using 2:xtic(1) t 2 ls 1, '' u 3 t 3 ls 2, '' u 4 t 4 ls 3, '' u 5 t 5 ls 4

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